In person it sounds just like "eh-hwai" or "ef-wai", LOL. He's aaaaalways saying it and I just go "Efwai" back at him. He doesn't seem to notice a difference.
Maybe it's bye-bye! He says it in greeting, though, so maybe he needs a refresher course in English.
Taco does that too, but it's usually in a desperate bid to make me stay in the bird room, lol. I can't leave if he says hello!
Could be any of those.
I know that Sam will sometimes say "HELLO" when I'm leaving - so who knows.
I did hear that on my headphones too. But all we can do is guess, he could be saying nonsense too.who think he's saying bye bye, and to me it sounds nothing at all like bye bye!